Description: A Tseitin axiom for logical exclusive disjunction, in deduction form. (Contributed by Giovanni Mascellani, 24-Mar-2018)
Ref | Expression | ||
---|---|---|---|
Assertion | tsxo2 | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | tsbi2 | |
|
2 | xnor | |
|
3 | 2 | orbi2i | |
4 | 1 3 | sylib | |